Haven't noticed any drop in battery life at all from iOS 10-11.1 - though have had a relatively unstable experience with applications freezing with iOS 11 in general, the phone freezing so badly that it doesn't respond to the Home+Power reset, app crashes etc.

YMMV, but so far I'm pretty unimpressed. iOS 10 was rock solid in comparison... the Beta is slightly better for app compatibility (Spotify music controls namely)

Haven't noticed any drop in battery life at all from iOS 10-11.1 - though have had a relatively unstable experience with applications freezing with iOS 11 in general, the phone freezing so badly that it doesn't respond to the Home+Power reset, app crashes etc.

You have an iPhone 7 so Home + Power does nothing. Use Volume Down + Power to do a forced restart/hard reset instead :)

Haven't noticed any drop in battery life at all from iOS 10-11.1 - though have had a relatively unstable experience with applications freezing with iOS 11 in general, the phone freezing so badly that it doesn't respond to the Home+Power reset, app crashes etc.

You have an iPhone 7 so Home + Power does nothing. Use Volume Down + Power to do a forced restart/hard reset instead :)

Oh dear - well, I haven't needed to look for a hard reset till I installed iOS 11 - but thank you for that, that clears that problem up and should help next time it freezes! (likely will be soon...)

I did need to ‘unenrol’ from the Beta program to go from 11.0.1 to 11.0.2 for some reason as even 3 days after public release my phone reported ‘up to dat’ on 11.0.1, but aside from the usual slight jerkiness and various apps not quite functioning in the PRE 11 beta, since it went ‘gold’ I’ve had no real issues except the Exchange email one that 11.0 and 11.0.1 had that was resolved in 11.0.2 (and works fine in 11.1 also)